<!DOCTYPE html>
<html lang="en">
Lab11 JavaScript函数this指向 17
<head>
 <meta charset="UTF-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width,initial-scale=1.0">
 <title>特殊场景this绑定实验</title>
</head>
<body>
 <button>按钮</button>
 <script>
setTimeout(function() {
 console.log("定时器函数:", this);
}, 1000);
var btnEl = document.querySelector("button");
btnEl.onclick = function() {
 console.log("btn的点击（onclick）:", this);
};
btnEl.addEventListener("click", function() {
 console.log("btn的点击（addEventListener）:", this);
});
var names = ["abc", "cba", "nba"];
names.forEach(function(item) {
 console.log("forEach:", this);
}, "aaaa");
 </script>
</body>
</html>